Remotely configurable solenoid driver circuit for direct pressur

Details Remotely configurable solenoid driver circuit for direct pressur Remotely configurable solenoid driver circuit for direct pressur

1987-12-22

1989-01-10

Chambers, A. Michael

Valves and valve actuation

Electrically actuated valve

Having means to produce digital pulses

3644241, 74752D, F16K 3106

Patent

active

047968532

ABSTRACT:
A driver circuit for the solenoid actuator coils of a direct pressure electronic transmission control. The circuit is remotely configurable for satisfying the requirements of both shifting and nonshifting modes of operation. In shifting modes of operation, a common snubber element is activated to permit fast commutation of the coil current while protecting the switching devices. In nonshifting modes of operation, dedicated free-wheeling diodes are activated to circulate the coil energy at turn-off of the switching devices to facilitate reduction energy consumption and heating.

REFERENCES:
patent: 3597630 (1971-08-01), Compoly et al.
patent: 3754402 (1973-08-01), Sanders et al.
patent: 4603268 (1986-07-01), Davis

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